Methacrylic Acid → Benzophenone

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Reaction Steps

In the following example, a terpolymer derivative having 0.88 mole % methacrylate and 0.07 mole % benzophenone (graft ratio 92.7%:7.3% methacrylate:benzophenone) was prepared by a procedure to Example A-3 except that the tetrabutylammonium salt was prepared by charging 101.3 mL tetrabutylammonium hydroxide (1.0 M in methanol), 8.3 g (8.2 mL) methacrylic acid, 1.01 g 4-hydroxybenzophenone, and 100 mL isopropanol to a second flask and stirring at room temperature to give a translucent yellowish solution. This mixture was then added to the polymeric cement, as in Example 4. The polymer was isolated by precipitation in isopropanol with 0.1% BHT stabilizer optionally added. 1HNMR (400 MHz, CDCl3) analysis confirmed 97.3% conversion of benzylic bromide to grafted species. These results are given in Table A.

Provenance & Evidence